[C# 15-Fundamentals and reference]: New Feature - Collection expression arguments #51440
Description
.NET 11 Preview
.NET 11 Preview 1
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New behavior
Test plan: dotnet/roslyn#80613
Collection expressions can now include with elements to specify arguments to the constructor of the collection being created.
In general, this will be used to specify comparers for Dictionary types, capacity for lists, and similar kinds of arguments.
For this feature update all articles that cover collection expressions to include an example or two that include with elements.
Note that dictionary expressions aren't available in a preview yet.
Language reference tasks
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Everyday C# tasks
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